cmakelists.txt - 与现有的Makefile结合使用

Question

Im new to CMakeLists.txt and it's syntax so Im hoping this is pretty easy.

Project has two subdirectories: A and B

A requires files from B

B has a CMakeLists.txt already.
A just has a Makefile . A doesn't build an executable; just a .o for another separate project(this folder is part of a larger build).

Ive create a CMakeLists.txt in the parent folder but I can't figure out how to call the make in folder A.

parent CMakeLists.txt

cmake_minimum_required (VERSION 3.2.3)
project(PARSER)

add_subdirectory(B)

add_custom_target(a-sub
   COMMAND "make"
   WORKING_DIRECTORY "./A")

When I build this it runs the make in folder B but does nothing to folder A.

Suggestions on how to proceed?

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Initially I tried to rewrite the existing (folder A) Makefile into a CMakeLists.txt but didn't get v far. This syntax is a bit tricky.

Answer 1

I don't think mixing make and cmake is a good idea. If you can't convert A to use cmake then I'd suggest making A and separate projects. Use cmake for B and install the headers and the libraries somewhere. Then use a makefile for A and point it to where B is installed.